<script>
  function submitForm()
  {
    var oForm = document.register;
    oForm.action="http://google.com";
    oForm.method="post";
    oForm.submit();    
  }
</script>

<form name="register">
  <input name="email">
  <a href="#" onClick="return submitForm();">
  Click Here to Submit
  </a>
</form>